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XMR+ Boost Rear


SKU: xmrbstrr
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Our XMR+ (Cross/Mountain/Road) Boost hubs are designed around the ISO 6-bolt rotor mounting interface as opposed to the Center Lock mounting standard used on our CLD hub.  The Boost spacing allows for wider hub flange spacing which results in better spoke bracing angles.  Made in our shop from U.S. sourced 6061-T6 aluminum, they’re available in a range of drillings, colors, and axle configurations.

A question we always get about our disc hubs is, “CLD or XMR? Which is better?”.  Neither is “better” than the other. Both share the same internals and the differences really come down to the respective designs having to accommodate the two different rotor mounting interfaces.  Bottom line is you really can’t go wrong with either hub!



  • U.S. made 6061-T6 aluminum
  • Enduro bearings
  • 6/4 titanium driver
  • 3-pawl, 48 point (7.5 degree) engagement
  • Easily serviceable/rebuildable
  • Compatible with 6-bolt rotors
  • Cassette spacer included only on XDR freehub bodies
    • Available separately for Shimano HG11 (part# SPACER11)


  • 306g
  • 28H, 32H, 36H, and 40H drillings
  • Axles:
    • 12mm x 148mm Thru


  • All Enduro ABEC 5 except 3802W (ABEC 3)

Driver Style

Left hub shell bearing Right hub shell bearing Inner driver bearing

Outer driver bearing

Shimano Hyperglide 11 speed

61902-SRS 61902-SRS 3802W LLB


Shimano Micro Spline

61902-SRS 61902-SRS 3802W LLB

3802W LLB


61902-SRS 61902-SRS 3802W LLB

3802W LLB

Campy 11 speed

61902-SRS 61902-SRS 3802W LLB

3802W LLB

Wheelbuilding specs

  • Spoke hole diameter
      • 2.6mm

Left flange diameter

Right flange diameter Center to left flange

Center to right flange


60mm 36.5mm


Technical Documents


Additional information

Weight N/A
Dimensions N/A


Spoke Count

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Axle Type

Cassette Compatibility

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XMR+ Boost Rear

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